On a few websites, editing within a text box doesn't always work properly. For example, website premiergymfit.co.uk has a text box for email address submission. I typed in "sdgjjg@hkkhg" then I tapped to the left of the letter "j" so that the cursor moved there, then I pressed the delete button. Instead of deleting the character to the left of where the cursor had been, the cursor jumped to the end and deleted the final character! So it ended up saying "sdgjjg@hkkh". (I have screenshots showing this.) But I just refreshed the page and tried it again, and the problem didn't happen. Are you able to reproduce this? Is it a Firefox bug? Is it a bug in some library / framework used by many websites? Thanks